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Title: Method of preparing graphene-sulfur nanocomposites for rechargeable lithium-sulfur battery electrodes

Patent ·
OSTI ID:1177548

A method of preparing a graphene-sulfur nanocomposite for a cathode in a rechargeable lithium-sulfur battery comprising thermally expanding graphite oxide to yield graphene layers, mixing the graphene layers with a first solution comprising sulfur and carbon disulfide, evaporating the carbon disulfide to yield a solid nanocomposite, and grinding the solid nanocomposite to yield the graphene-sulfur nanocomposite. Rechargeable-lithium-sulfur batteries having a cathode that includes a graphene-sulfur nanocomposite can exhibit improved characteristics. The graphene-sulfur nanocomposite can be characterized by graphene sheets with particles of sulfur adsorbed to the graphene sheets. The sulfur particles have an average diameter of less than 50 nm.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Number(s):
8,999,574
Application Number:
14/225,561
OSTI ID:
1177548
Resource Relation:
Patent File Date: 2014 Mar 26
Country of Publication:
United States
Language:
English

References (10)

High Performance Batteries with Carbon Nanomaterials and Ionic Liquids patent-application October 2009
Lithium metal-sulfur and lithium ion-sulfur secondary batteries containing a nano-structured cathode and processes for producing same patent-application July 2011
The preparation of nano-sulfur/MWCNTs and its electrochemical performance journal November 2010
Preparation of nano-structured LiFePO4/graphene composites by co-precipitation method journal January 2010
New Method To Prepare Graphite Nanocomposites journal March 2008
A highly ordered nanostructured carbon–sulphur cathode for lithium–sulphur batteries journal May 2009
Ternary Self-Assembly of Ordered Metal Oxide−Graphene Nanocomposites for Electrochemical Energy Storage journal March 2010
Self-Assembled TiO 2 –Graphene Hybrid Nanostructures for Enhanced Li-Ion Insertion journal March 2009
Improvement of cycle property of sulfur-coated multi-walled carbon nanotubes composite cathode for lithium/sulfur batteries journal April 2009
Novel nanosized adsorbing sulfur composite cathode materials for the advanced secondary lithium batteries journal January 2006

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